---
title: "CVE-2026-105945: Apache Pulsar - Broken Access Control"
description: "Apache Pulsar 2.10.0 < 4.0.14 and 4.1.0 < 4.2.5 contain a broken access control caused by improper validation of package version in filesystem storage provider, letting authenticated users with packages permission on any namespace access or modify packages in other tenants or namespaces, exploit requires package management enabled with filesystem storage provider."
url: https://panop.io/threat-heartbeat/CVE-2026-105945/
---

# CVE-2026-105945 Apache Pulsar - Broken Access Control

Apache Pulsar 2.10.0 < 4.0.14 and 4.1.0 < 4.2.5 contain a broken access control caused by improper validation of package version in filesystem storage provider, letting authenticated users with packages permission on any namespace access or modify packages in other tenants or namespaces, exploit requires package management enabled with filesystem storage provider.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-105945)

## Details

Type

Broken Access Control

Impact

Data Tampering, Information Disclosure, Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

21 October 2026

Updated

22 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Upgrade to at least 4.0.14 for 4.0.x versions or 4.2.5 for 4.1.x and 4.2.x versions, or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-105945](https://nvd.nist.gov/vuln/detail/CVE-2026-105945)
- [https://lists.apache.org/thread.html/o5jt8zrg1qxqdrqlb06jjmj4lzydfm2k](https://lists.apache.org/thread.html/o5jt8zrg1qxqdrqlb06jjmj4lzydfm2k)
- [https://pulsar.apache.org/security/CVE-2026-105945/](https://pulsar.apache.org/security/CVE-2026-105945/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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